Smoke-consuming furnace.



R. L. WALKER.

SMOKE UONQUMING FURNACE.

APILIOATION FILED DEU.'7,1905.

Patented Feb. 9, 1909.

2 SHEETS-SHEET 1.

ATTORNEYS THE NORRIS PJTSRS c0.. wAsl-lmsnm, 0.x

R. L. WALKER.

I $MOKE GONSUMING FURNACE.

APPLICATION FILED 1130.7,1905.

Patnted Feb. 9, 1909.

2 SHEETS-SHEET 2.

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PATENT n res.

ROBERT WALKER, OF BROOKLYN, NEW YORK.-

SIVEOKE-CONSUMING FURNACE.

Specification of Letters Patent.

Patented Feb. 9, 1909.

Application filed December 7, 1905. Serial No. 290,669.

To all whom it may concern:

Be it known that 1, ROBERT L. WALKER, a citizen of the United States,and resident of Brooklyn, in the county of Kings and State of New York,have invented a certain new and useful Improvement in Smoke-ConsumingFurnaces, of which the following is a specification, reference being hadto the drawings accompanying and forming'part of the same. I

My invention relates to a furnace witha fire-box which is dividedhorizontally in two portions and its lower portion also dividedvertically by an upright partition into two portions; together with adamper which forms a cover first to one lower portion of the dividedfire-box and then to the other lower portion. 7

It relates particularly to certain improvements u on my former patent479,100, patented Ju y 19, 1892 as will more fully appear hereinafter. Vo v In the accompanying. drawings in which the same reference characterrefers to similar parts in the several figures, Figure 1 is a verticallongitudinal section through a locomotive boiler; Fig. 2 is a verticalsection upon line 22 of Fig. 1; Fig. 3 is a vertical section upon line3-3 of Fig. 1 Fig. 4 is an elevation of the rear of the boiler, certain.parts being shown in section; V Fig. 5 is a vervided Trebox iscompelled to pass around the inner end of the water leg 5 and under thearch of the other part and over the incandescent fuel in the secondportion of the firebox in order to get to the flues 2 leading to thefront portion of the boiler 3 and thence to the stack 125, consuming thesmoke in the well known manner set forth in my previous patentmentioned. The damper 7 has a trunnion 21 which fits within thecomplementary opening 115 in the saddle 22. This damper has circuitouspassages 8 and hollow portions 9. At the oppositev end from the trunnionit has an extended bearing which passes through the rear of the boilerand is supported upon the rollers 20 mounted upon the plate 33 which isfirmly secured to the boiler by means of bolts 32, 32 which extend outfrom the boiler and plate 33 and at their other end carry the plate 14which is loosely mounted upon the end of the bearing 10 of the damper 7.The face of this plate 14 acts as a bearing for the cones 15, 15, theother portion of this bearing being the plate 16 which is looselymounted upon bearing 10 and is held in place by the spring 17 whichbears at one end upon the plate 16 and at the other upon the cog 48.This cog wheel is fastened to the bearing 10 by being shrunk upon thesame or otherwise suitably fastened. The ring 14 is adjustable along thelength of the bearing 10 by means of the nuts 106 upon the bolts 32. Bythis construction the damper 7-is firmly pressed into its seat 115within the saddle 22 by means of the pressure exerted from theadjustable plate 14 pressing upon the cones 15, the ring 16, the spring17 and the fixed pinion 48 within which the spring is partly seated asshown. The thrust of the damper within its seat in the saddle 22 can beregulated as previously noted by the nuts 106 upon the bolts 32. Indevices of this character it"fis very essential that there be a goodcirculation through the water leg 5, the saddle 22 and the damper 7. Toinsure proper circulation I use an inlet pipe 107 which connects thewater leg 5 with the boiler across the constricted passage 1 below thecombustion arch 4. Water passing through this pipe 107 into the waterleg 5 circulates up through the opening 108 in the leg 5 and into thesaddle 22 and then out through the water leg connection 23 into theupper portion of the boiler. I sometimes also use the brace pipes 124,124, Fig. 5, as outlets for the water leg 5 though those may bedispensed with. On the under side of the boiler there is preferablyformed a depending flange 102 to which is secured the plate 103 by meansof rivets 104. Mounted upon this plate 103 and securely fastened theretoI locate a circulating pump 27 having an intake in the boiler at 30 andproper controlling valve 28. The water passing in at 30 is forcedthrough the pump and through pipe 26 into the injector 25. This injectorconsists of a pipe 24 having its end perforated by perforations 109.Securely fitted Within this end of the pipe is the end of the pipe 26which has a reduced end 31 as shown. The Water forced throu h the pipe26 causes a circulation of Water in the boiler through the perforations109 into the pipe 24 in a Well knovvn manner and from this pipe 24 it isforced into the saddle 22, thence through the circuitous passages 8 ofthe damper '7 and out through the damper outlet or discharge pipe 11back to the top of the boiler. This outlet 11 has a packing ring 12which makes a water and steam tight connection between 10 and 11 butpermits bearing 10 to move relatively to the outlet 11.

For operating the damper 7 so as to make it close one or the otherportions of the lireboX 1, l, I use a pinion 48 fast upon the bearing 10of the damper. Meshing directly with this pinion is a rack 47 which isoper ated by means of the steam cylinder 34. The cross rods 37, 38 whichconnect the rack with the piston rod 36 of the steam cylinder alsoconnect with the piston rod 39 of the hydraulic cylinder 40. Steam isadmitted from the boiler through the inlet valve 110 and pipe 44 to theordinary three- Way valve 43. This valve controls the admission andexhaust of the steam to the steam cylinder 34 previously mentioned andin an obvious manner causes the piston to move back and forth Within thecylinder and in this may move, through the rack bar 47 and the pinion48, the damper 7 upon its seat 115 in the saddle 22 and upon the bearingcylinders 20. To prevent too rapid movement of the damper I sometimesemploy an arm 13 fast upon the bearing 10 of the damper by being shrunkupon the same or otherwise suitably secured. thereto; to the end of thisarm I secure a chain 111 which at its other end is connected to the eyebelt 122 carried by a plate 113 which bears against the butler spring114. While I may use this butler spring and arm connected to the bearing10 of the damper as described I preferably employ a hydraulic cylinder40 having its piston rod 39 connected to the same cross rods 37, 38which connect the rack 47 and the piston rod of the steam cylinder 34 aspreviously mentioned. Each end of the hydraulic cylinder is connected bythe pipe 45 Within which is located the throttle valve 46. By adjustingthis valve it is obvious that a too rapid. movement of the damperthrough its operating cylinder 34 can be prevented. In addition to thishydraulic cushioning means the buller spring construction previouslyreferred to may also be used.

VJhile l have shown this invention applied toa locon'iotive boiler, itis obvious it may be used upon other boilers and l. therefore do notdesire to limit myself to the disclosure made in this case, but what 1.claim new and what ll desire to secure by .liettcrs Patent is set forthin the appended claim.

in locomotive boiler furnaces, a lire-box provided with a grate, a waterleg to divide said iire-box into compartinents, a combustion arch at thefront end of the lire-box to form a constricted passage around the frontof said water leg beneath said arch, a thrust bearing mounted on saidWater log, a pivoted damper mounted in said thrust bearing and having atrunnion projecting thrmigh the rear water face of the boiler, a rollerbearing for said trunnion supported by and mounted close to said waterface, a pinion on said trunnion, a bearing plate engaging said trunnionand loosely supported from said Water face, an an'til riction bearingand thrust spring between. said bearing plate and said pinion to holdsaid damper against said thrust bearing, a rack cooperating with saidpinion, a steam operating cylinder and hydraulic cushioning cylindersubstantially parallel to said. rack, an operating piston having apiston rod projecting through both ends of said steam cylinder, asimilar cushioning piston and piston rod in said hydraulic cylind .r,cross-bars rigidly connecting said rack and said piston rods, steamconnections comprising a three-way valve to operate said steam, cylinderand piston, an adjustable throttling lay-pass around said hydrauliccylinder, a circulating pump to mr r-itively circulate water from thecool part of said boiler through a staggered. passage formed in saiddamper, and a damper outlet carrying said water back into the boiler.

ROBT. L. lVALKEH. Vi itnesses JAMES N. Ciixizow, ALAN M. Jonnson.

